<template>
    <div>
         <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
             <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>

            <!-- 警告区域 -->
            <el-alert
                title="添加商品信息"
                type="info"
                center
                show-icon
                :closable="false">
            </el-alert>

            <!--步骤条 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>


            <!-- tab标签区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" 
            label-width="100px" label-position="top">
             <el-tabs v-model="activeIndex" :tab-position="'left'" 
             :before-leave="beforeTabLeave"
             @tab-click="tabClicked">
                <el-tab-pane label="基本信息" name="0"
                >
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price" type="number">
                        <el-input v-model="addForm.goods_price"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight" type="number">
                        <el-input v-model="addForm.goods_weight"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number" type="number">
                        <el-input v-model="addForm.goods_number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                        <el-cascader
                            v-model="addForm.goods_cat"
                            :options="catelist"
                            expand-trigger="hover"
                            :props="cateProps"
                            @change="handleChange"></el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <el-form-item 
                    :label="item.attr_name" 
                    v-for="item in manyTableData" 
                    :key="item.attr_id">
                    <!-- 复选框组 -->
                      <el-checkbox-group v-model="item.attr_vals">
                        <el-checkbox :label="cb" 
                        v-for="(cb,i) in item.attr_vals"
                        :key="i" border></el-checkbox>
                      </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" 
                    v-for="item in onlyTableData"
                    :key="item.attr_id">
                        <el-input v-model="item.attr_vals">

                        </el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <el-upload
                    :action="uploadURL"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture" :headers="headerObj" 
                    :on-success="handleSuccess">
                    <el-button size="small" type="primary"
                    >点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <quill-editor v-model="addForm.goods_introduce">
                    </quill-editor>
                    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
            </el-form>
        </el-card>

        <el-dialog
  title="图片预览"
  :visible.sync="previewVisible"
  width="50%">
  <img :src="previewPath" alt="" class="previewImg">
  </span>
</el-dialog>

    </div>

    
</template>

<script>

import _ from 'lodash'
export default {
    data(){
        return {
            activeIndex:"0",
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:[],
                pics:[],
                // 商品的详情描述
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[
                    {
                        required:true,messages:'请输入商品名称',trigger:'blur'
                    }
                ],
                goods_price:[
                    {
                        required:true,messages:'请输入商品价格',trigger:'blur'
                    }
                ],
                goods_weight:[
                    {
                        required:true,messages:'请输入商品重量',trigger:'blur'
                    }
                ],
                goods_number:[
                    {
                        required:true,messages:'请输入商品数量',trigger:'blur'
                    }
                ],
                goods_cat:[
                    {
                        required:true,messages:'请选择商品分类',trigger:'blur'
                    }
                ]
            },
            catelist:[],
            cateProps:{
                label:"cat_name",
                value:'cat_id',
                chilldren:"chilldren"
            },
            manyTableData:[],
            onlyTableData:[],
            // 上传图片的URL地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的headers请求头对象
            headerObj:{
                Authorization:
                window.sessionStorage.getItem('token')
            },
            previewVisible:false,
            previewPath:''
        }
    },
    created() {
        this.getCateList()
    },
    methods:{
        // 获取所有商品分类数据
        async getCateList(){
            const {data:res} =  await this.$http.get(`categories`)

            if(res.meta.status!==200){
                return this.$messages.error('获取商品分类数据失败')
            }

            this.catelist = res.data
            console.log(this.catelist)
        },
        // 级联选择器选中项变化，会触发这个函数
        handleChange(){
            // 
            console.log(this.addForm.goods_cat)
            if(this.addForm.goods_cat.length!==3){
                this.addForm.goods_cat = []
            }
        },
        beforeTabLeave(activeName,oldActiveName){
            if(oldActiveName==="0"&&this.addForm.goods_cat.length!==3){
                this.$message.error('请选择商品分类')
                return false
            }
        },
        async tabClicked(){
            // console.log(this.activeIndex)
            // 动态参数面板
            if(this.activeIndex === '1'){
                // console.log("动态参数面板")
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,
                {   params:{sel:'many'}})
                if(res.meta.status!==200){
                    return this.$message.error("获取动态参数列表失败")
                }
                console.log(res.data)

                res.data.forEach(item=>{
                    item.attr_vals=item.attr_vals.length===0?[]:item.attr_vals.split(' ')
                })
                this.manyTableData = res.data
            }else if(this.activeIndex === "2"){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,
                {   params:{sel:'only'}})
                if(res.meta.status!==200){
                    return this.$message.error("获取静态参数列表失败")
                }

                this.onlyTableData = res.data
            }
        },
        // 处理图片预览效果
        handlePreview(file){
            console.log(file)
            this.previewPath = 
            file.response.data.url
            this.previewVisible = true
        },
        // 删除图片
        handleRemove(file){
            console.log(file)
            const filePath = file.response.data.tmp_path
            const i = this.addForm.pics.findIndex(
                x=> x.pic === filePath
            )
            this.addForm.pics.splice(i,1)
        },
        // 监听图片上传成功的界面
        handleSuccess(response){
            const picInfo = { pic: response.data.tmp_path }
            this.addForm.pics.push(picInfo)
            console.log(this.addForm)
        },
        add(){
            
            this.$refs.addFormRef.validate(async valid => {
                
                const form = _.cloneDeep(this.addForm)
                // lodash cloneDeep(obj)
                form.goods_cat=form.goods_cat.join(',')
                this.manyTableData.forEach(item=>{
                    const newInfo ={ attr_id:item.attr_id
                    ,attr_value:item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                // 处理静态属性
                this.onlyTableData.forEach(item=>{
                    const newInfo ={ attr_id:item.attr_id
                    ,attr_value:item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                console.log(form)
                // 发起请求
                // 商品名称必须唯一
                const {data:res} = await this.$http.post('goods',form)

                if(res.meta.status !== 201){
                    return this.$message.error('添加商品失败！')
                }
                this.$message.success('添加商品成功！')

                this.$router.push('/goods')
                if(!valid){
                    return this.$message.error('请填写必要的表单项目')
                }
                
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style lang="less" scoped>
    .el-checkbox{
        margin: 0 5px 0 0!important;
    }
    .previewImg{
        widows: 100%;
    }
    .btnAdd{
        margin-top: 15px;
    }
</style>